v3.26.1
Variable interest entities and asset securitizations - Asset-backed Notes Issued to Investors (Details) - USD ($)
6 Months Ended
Jun. 30, 2026
Dec. 31, 2025
Variable Interest Entity [Line Items]    
Asset-Backed Notes to Investors $ 2,779,000,000 $ 1,730,000,000
August 2023 | Equipment finance loans and leases    
Variable Interest Entity [Line Items]    
Remaining Loan Collateral Balance 177,000,000 244,000,000
Asset-Backed Notes to Investors $ 78,000,000 141,000,000
Weighted-Average Life (In years) 4 months 24 days  
Weighted-Average Rate 5.74%  
March 2024 | Automobile loans    
Variable Interest Entity [Line Items]    
Remaining Loan Collateral Balance $ 197,000,000 252,000,000
Asset-Backed Notes to Investors $ 183,000,000 239,000,000
Weighted-Average Life (In years) 1 year  
Weighted-Average Rate 5.20%  
August 2024 | Equipment finance loans and leases    
Variable Interest Entity [Line Items]    
Remaining Loan Collateral Balance $ 383,000,000 483,000,000
Asset-Backed Notes to Investors $ 315,000,000 396,000,000
Weighted-Average Life (In years) 1 year 1 month 6 days  
Weighted-Average Rate 4.82%  
February 2025 | Automobile loans    
Variable Interest Entity [Line Items]    
Remaining Loan Collateral Balance $ 424,000,000 529,000,000
Asset-Backed Notes to Investors $ 407,000,000 513,000,000
Weighted-Average Life (In years) 1 year 2 months 12 days  
Weighted-Average Rate 4.71%  
May 2025 | Equipment finance loans and leases    
Variable Interest Entity [Line Items]    
Remaining Loan Collateral Balance $ 461,000,000 546,000,000
Asset-Backed Notes to Investors $ 373,000,000 441,000,000
Weighted-Average Life (In years) 1 year 6 months  
Weighted-Average Rate 4.77%  
February 2026 | Recreational finance loans    
Variable Interest Entity [Line Items]    
Remaining Loan Collateral Balance $ 514,000,000 0
Asset-Backed Notes to Investors $ 452,000,000 0
Weighted-Average Life (In years) 4 years 7 months 6 days  
Weighted-Average Rate 4.35%  
Asset Backed Notes May 2026 | Automobile loans    
Variable Interest Entity [Line Items]    
Remaining Loan Collateral Balance $ 976,000,000 0
Asset-Backed Notes to Investors $ 971,000,000 $ 0
Weighted-Average Life (In years) 1 year 7 months 6 days  
Weighted-Average Rate 4.43%